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Asteroid 7 Iris

Available Resources

Asteroid 7 Iris Sky Charts and Coordinates

This is a simplified sky chart, showing where Asteroid 7 Iris is now with respect to the brightest stars and constellations.

More advanced sky charts are available on TheSkyLive for this object: 1) the Online Planetarium which is interactive and allows to select dates and additional objects to visualize; and 2) the Live Position and Data Tracker which provides the highest precision position data and features deep sky imagery from the Digitized Sky Survey.

Asteroid 7 Iris in Cancer on July, 23 2018
High Precision Live Sky Chart
08h 53m 30s
+14° 05’ 59”
 = visible to the naked eye
 = binocular, brighter than 10th magnitude
= current altitude ≥ 30°   = current altitude < 30°   = below the horizon
Location: Greenwich, United Kingdom [change]

Asteroid 7 Iris Rise and Set Times

Today's Asteroid 7 Iris rise, transit and set times from Greenwich, United Kingdom [change]. All times are relative to the local timezone Europe/London.

Azimuth: 75.9°
Max altitude: 52.6°
Azimuth: 284.1°

Asteroid 7 Iris Orbit Diagram

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Asteroid 7 Iris with respect of the Sun and the orbits of the major planets. The position of Asteroid 7 Iris and the planets along their orbits in this diagram accurately represents the current configuration of the objects in the Solar System. This is an experimental feature and it requires a WebGL enabled browser. Please provide us feedback!

Asteroid 7 Iris Ephemeris

The following table lists the ephemerides of Asteroid 7 Iris computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Asteroid 7 Iris in our Online Planetarium at the chosen date.

Date MagnitudeMag Right AscensionR.A. DeclinationDec. Constellation
2018 Jul 16 10.34 08h 39m 44s +15° 04’ 45” Cancer
2018 Jul 17 10.34 08h 41m 43s +14° 56’ 34” Cancer
2018 Jul 18 10.33 08h 43m 41s +14° 48’ 17” Cancer
2018 Jul 19 10.33 08h 45m 39s +14° 39’ 59” Cancer
2018 Jul 20 10.32 08h 47m 38s +14° 31’ 35” Cancer
2018 Jul 21 10.32 08h 49m 36s +14° 23’ 07” Cancer
2018 Jul 22 10.32 08h 51m 33s +14° 14’ 35” Cancer
2018 Jul 23 10.31 08h 53m 30s +14° 05’ 59” Cancer
2018 Jul 24 10.31 08h 55m 26s +13° 57’ 20” Cancer
2018 Jul 25 10.30 08h 57m 23s +13° 48’ 38” Cancer
2018 Jul 26 10.30 08h 59m 18s +13° 39’ 51” Cancer
2018 Jul 27 10.29 09h 01m 14s +13° 31’ 01” Cancer
2018 Jul 28 10.29 09h 03m 10s +13° 22’ 08” Cancer
2018 Jul 29 10.28 09h 05m 04s +13° 13’ 10” Cancer

Distance of Asteroid 7 Iris from Earth

The following chart shows the distance of Asteroid 7 Iris from Earth as a function of time. Distance data is measured in Astronomical Units and sampled with a 2 days interval.

The reported distances might be inaccurate around the times of closest approach for objects passing extremely close to Earth. The value of the distance of 7 Iris is also available as a real time updated value in the Live Position and Data Tracker.

Distance of Asteroid 7 Iris from Earth between January 2013 and December 2075

Light Curve of Asteroid 7 Iris

The following chart is the predicted light curve (visual magnitude as a function of time) of Asteroid 7 Iris, according to the most recent ephemerides data. Magnitude data is sampled with a 2 days interval and there might be inaccuracies for objects changing brightness very rapidly during the course of a few days. For comets there could be large discrepancies between the observed and predicted brightness because of their highly dynamic behaviour.

Predicted magnitude of Asteroid 7 Iris between January 2013 and December 2075

Asteroid 7 Iris Physical Data

The following shows the known values of the most important physical parameters of Asteroid 7 Iris. Source: JPL Small-Body Database

Physical Parameter Value Relative to Earth
Diameter 199.83 km 0.0157
Sideral Rotation 7.1390 hours 0.2983
Absolute Magnitude 5.51
Geometric Albedo 0.2766

Asteroid 7 Iris Orbital Elements

The following table lists the orbital elements of Asteroid 7 Iris at epoch 22 March 2018 00:00 UTC (JD: 2458200.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.23139770
Orbit inclination i 5.52348949°
Perihelion distance q 1.83359509 AU
274,301,922 km
Aphelion distance Q 2.93765028 AU
439,466,228 km
Semi-major axis a 2.38562269 AU
356,884,075 km
Orbital period period 3.6800 years
1,345.8636 days
Date of perihelion transit Tp 2017-Nov-18 07:20:28
2,458,075.8059 JD
Next perihelion transit 2021-Jul-26 04:04
2,459,421.6695 JD
Argument of perihelion peri 145.30147448543°
Longitude of the ascending node node 259.56236737775°
Mean anomaly M 33.353958879952°
Mean motion n 0.26748624°/day
Closest approach to Earth* 2017-Oct-31
Distance of closest approach* 0.84895471 AU
127,001,816 km

* NOTE: values for the closest approach are computed for the time interval between 2013-Jan-01 and 2075-Dec-31, with a sampling interval of 1 day.